12423032421 has 32 divisors (see below), whose sum is σ = 18191029248. Its totient is φ = 7508966400.

The previous prime is 12423032407. The next prime is 12423032423.

It is a happy number.

12423032421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12423032421 - 2²¹ = 12420935269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12423032391 and 12423032400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423032423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157996 + ... + 223178.

It is an arithmetic number, because the mean of its divisors is an integer number (568469664).

Almost surely, 2^12423032421 is an apocalyptic number.

It is an amenable number.

12423032421 is a deficient number, since it is larger than the sum of its proper divisors (5767996827).

12423032421 is a wasteful number, since it uses less digits than its factorization.

12423032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65341.

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 124230 and 32421, that added together give a palindrome (156651).

The spelling of 12423032421 in words is "twelve billion, four hundred twenty-three million, thirty-two thousand, four hundred twenty-one".